Initial commit
mbed-dev-master/targets/TARGET_STM/hal_tick_overrides.c@0:bb348c97df44, 2020-09-16 (annotated)
- Committer:
- lypinator
- Date:
- Wed Sep 16 01:11:49 2020 +0000
- Revision:
- 0:bb348c97df44
Added PWM
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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lypinator | 0:bb348c97df44 | 1 | /* mbed Microcontroller Library |
lypinator | 0:bb348c97df44 | 2 | * Copyright (c) 2006-2018 ARM Limited |
lypinator | 0:bb348c97df44 | 3 | * |
lypinator | 0:bb348c97df44 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
lypinator | 0:bb348c97df44 | 5 | * you may not use this file except in compliance with the License. |
lypinator | 0:bb348c97df44 | 6 | * You may obtain a copy of the License at |
lypinator | 0:bb348c97df44 | 7 | * |
lypinator | 0:bb348c97df44 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
lypinator | 0:bb348c97df44 | 9 | * |
lypinator | 0:bb348c97df44 | 10 | * Unless required by applicable law or agreed to in writing, software |
lypinator | 0:bb348c97df44 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
lypinator | 0:bb348c97df44 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
lypinator | 0:bb348c97df44 | 13 | * See the License for the specific language governing permissions and |
lypinator | 0:bb348c97df44 | 14 | * limitations under the License. |
lypinator | 0:bb348c97df44 | 15 | */ |
lypinator | 0:bb348c97df44 | 16 | #include "hal/us_ticker_api.h" |
lypinator | 0:bb348c97df44 | 17 | #include "us_ticker_data.h" |
lypinator | 0:bb348c97df44 | 18 | |
lypinator | 0:bb348c97df44 | 19 | // This variable is set to 1 at the of mbed_sdk_init function. |
lypinator | 0:bb348c97df44 | 20 | // The ticker_read_us function must not be called until the mbed_sdk_init is terminated. |
lypinator | 0:bb348c97df44 | 21 | extern int mbed_sdk_inited; |
lypinator | 0:bb348c97df44 | 22 | |
lypinator | 0:bb348c97df44 | 23 | // Defined in us_ticker.c |
lypinator | 0:bb348c97df44 | 24 | void init_16bit_timer(void); |
lypinator | 0:bb348c97df44 | 25 | void init_32bit_timer(void); |
lypinator | 0:bb348c97df44 | 26 | |
lypinator | 0:bb348c97df44 | 27 | #if TIM_MST_BIT_WIDTH == 16 |
lypinator | 0:bb348c97df44 | 28 | // Variables also reset in us_ticker_init() |
lypinator | 0:bb348c97df44 | 29 | uint32_t prev_time = 0; |
lypinator | 0:bb348c97df44 | 30 | uint32_t elapsed_time = 0; |
lypinator | 0:bb348c97df44 | 31 | #endif |
lypinator | 0:bb348c97df44 | 32 | |
lypinator | 0:bb348c97df44 | 33 | // Overwrite default HAL functions defined as "weak" |
lypinator | 0:bb348c97df44 | 34 | |
lypinator | 0:bb348c97df44 | 35 | HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) |
lypinator | 0:bb348c97df44 | 36 | { |
lypinator | 0:bb348c97df44 | 37 | #if TIM_MST_BIT_WIDTH == 16 |
lypinator | 0:bb348c97df44 | 38 | init_16bit_timer(); |
lypinator | 0:bb348c97df44 | 39 | #else |
lypinator | 0:bb348c97df44 | 40 | init_32bit_timer(); |
lypinator | 0:bb348c97df44 | 41 | #endif |
lypinator | 0:bb348c97df44 | 42 | return HAL_OK; |
lypinator | 0:bb348c97df44 | 43 | } |
lypinator | 0:bb348c97df44 | 44 | |
lypinator | 0:bb348c97df44 | 45 | uint32_t HAL_GetTick() |
lypinator | 0:bb348c97df44 | 46 | { |
lypinator | 0:bb348c97df44 | 47 | #if TIM_MST_BIT_WIDTH == 16 |
lypinator | 0:bb348c97df44 | 48 | uint32_t new_time; |
lypinator | 0:bb348c97df44 | 49 | if (mbed_sdk_inited) { |
lypinator | 0:bb348c97df44 | 50 | // Apply the latest time recorded just before the sdk is inited |
lypinator | 0:bb348c97df44 | 51 | new_time = ticker_read_us(get_us_ticker_data()) + prev_time; |
lypinator | 0:bb348c97df44 | 52 | prev_time = 0; // Use this time only once |
lypinator | 0:bb348c97df44 | 53 | return (new_time / 1000); |
lypinator | 0:bb348c97df44 | 54 | } |
lypinator | 0:bb348c97df44 | 55 | else { |
lypinator | 0:bb348c97df44 | 56 | new_time = us_ticker_read(); |
lypinator | 0:bb348c97df44 | 57 | elapsed_time += (new_time - prev_time) & 0xFFFF; // Only use the lower 16 bits |
lypinator | 0:bb348c97df44 | 58 | prev_time = new_time; |
lypinator | 0:bb348c97df44 | 59 | return (elapsed_time / 1000); |
lypinator | 0:bb348c97df44 | 60 | } |
lypinator | 0:bb348c97df44 | 61 | #else // 32-bit timer |
lypinator | 0:bb348c97df44 | 62 | if (mbed_sdk_inited) { |
lypinator | 0:bb348c97df44 | 63 | return (ticker_read_us(get_us_ticker_data()) / 1000); |
lypinator | 0:bb348c97df44 | 64 | } |
lypinator | 0:bb348c97df44 | 65 | else { |
lypinator | 0:bb348c97df44 | 66 | return (us_ticker_read() / 1000); |
lypinator | 0:bb348c97df44 | 67 | } |
lypinator | 0:bb348c97df44 | 68 | #endif |
lypinator | 0:bb348c97df44 | 69 | } |
lypinator | 0:bb348c97df44 | 70 | |
lypinator | 0:bb348c97df44 | 71 | void HAL_SuspendTick(void) |
lypinator | 0:bb348c97df44 | 72 | { |
lypinator | 0:bb348c97df44 | 73 | // Do nothing |
lypinator | 0:bb348c97df44 | 74 | } |
lypinator | 0:bb348c97df44 | 75 | |
lypinator | 0:bb348c97df44 | 76 | void HAL_ResumeTick(void) |
lypinator | 0:bb348c97df44 | 77 | { |
lypinator | 0:bb348c97df44 | 78 | // Do nothing |
lypinator | 0:bb348c97df44 | 79 | } |